Here is mine. I choose to cut the top off, and gut it. Also cut treads in the old post from under side and put post. But can do a bolt washer. Had the extra post and cables so just tried them.
Rubbed the box down with Red Weneol and then wax looks better than new
I also had some plastic angle so epoxied it on so the lid would stay put.
http://s234.photobucket.com/user/fast340six/slideshow/BatteryHere is 2 other members here Batts one is done from under other is done from top
http://s234.photobucket.com/user/fast340six/slideshow/Battery2